body{
    max-width: 1080px;
    margin:auto;
}

.clf::after{
    content: '';
    display: block;
    clear: both;
}

.block-img{
    display: block;
    width: 100%;
}

header{
    width: 100%;
    height: 200px;
}

.header-left{
    float: left;
    width: 70%;
    float: left;
}

.header-right{
    float: left;
    width:30%;
}

.login-area>img{
    float: left;
    width: 50%
}

.login-area>p{
    width: 25%;
    float: left;
    text-align: center;
}

nav>div{
    float: left;
    width: 20%;
    text-align: center;
}

nav>div:hover::after{
    content: '';
    display:block;
    width: 100%;
    height: 3px;
    background: #000;
}

.tips{
    margin: 10px 0;
    padding: 30px;
    background-color: #ddd;
    color: #fff;
    text-align: center;
}

.banner-roller{
    position: relative;
    width: 100%;
    height: 700px;
    overflow: hidden;
}

.slider{
    position: absolute;
    transform:translate(0,0);
    transition:transform 0.3s ease-in-out;
}

.slider>img{
    float: left;
}

.dots{
    position: absolute;
    z-index: 2;
    right: 20px;
    bottom: 20px;
}

.dots>div{
    float: left;
    padding: 10px;
    background-color: rgba(0,0,0,0.2);
    margin: 5px;
    border-radius: 999px;
}

.dots>div.active{
    background-color: rgba(0,0,0,0.7);
}

.img-wall{
    margin-top: 10px;
    width: 100%;
    display: flex;
    flex-direction:row;
    justify-content:space-between;

}

.img-wall>*{
    flex-grow:1;
    margin-right: 10px;
}

.img-wall>*:last-child{
    margin-right: 0;
}

footer{
    margin-top: 20px;
    width: 100%;
}

footer>div{
    float: left;
    width: 80%;
}

footer>img.block-img{
    float: left;
    width: 20%;
}